From 858cca5a38c1d9b3ea32592a00b57bb853e789cf Mon Sep 17 00:00:00 2001
From: Daniel Wirtz <dcode@dcode.io>
Date: Mon, 18 Mar 2019 17:11:02 +0100
Subject: [PATCH] Fix arrow function body parsing precedence (#546)

---
 src/parser.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/parser.ts b/src/parser.ts
index aa0e3741..572984e9 100644
--- a/src/parser.ts
+++ b/src/parser.ts
@@ -1437,9 +1437,14 @@ export class Parser extends DiagnosticEmitter {
       tn.range(signatureStart, tn.pos)
     );
 
-    var body: Statement | null;
+    var body: Statement | null = null;
     if (arrowKind) {
-      body = this.parseStatement(tn, false);
+      if (tn.skip(Token.OPENBRACE)) {
+        body = this.parseBlockStatement(tn, false);
+      } else {
+        let bodyExpression = this.parseExpression(tn, Precedence.COMMA + 1);
+        if (bodyExpression) body = Node.createExpressionStatement(bodyExpression);
+      }
     } else {
       if (!tn.skip(Token.OPENBRACE)) {
         this.error(